1. 无法觉察的,无法发现的：beaconry 无线电与雷达信号学 | undetectable 无法觉察的,无法发现的 | birdie 小鸟
2. 探测不到的：undesired signal 干扰信号 | undetectable 探测不到的 | undetected 未检测到的
3. 不易被发现的未暴露的：underwriting 保险业海上保险业 | undetectable 不易被发现的未暴露的 | undevelopable 不能展开的
4. 不可探测：Smooth and sleek 光滑(空气?) | Undetectable 不可探测. | Tomahawk Launcher 战斧导弹
1. By one hour after eating, the allergen level in six of the seven subjects was undetectable.
2. " Very soon we will become very undetectable, " he said.
3. The back of every card was marked with a liquid undetectable by eye.
adj
1. \u0064\u0061\u006E\u0063\u0069\u002E\u0039\u0031\u0031\u0063\u0068\u0061\u002E\u0063\u006F\u006D
1. barely able to be perceived
e.g. the transition was almost indiscernible
an almost insensible change
Synonym: indiscernible insensible
2. not easily seen